An advertising, architectural double bevel ruler Made in the U.S.A. by Woodrow has plastic laminated scales on the front side and imprinted scales on the flat wooden back. It is an advertising for Records Management and I have seen it described as Model Number 0610A although it is not marked. The front scales measure in: 1/8"-1/4" & 1/2"-1" back scales: 3/8"-3/4" & 1 1/2"-3". The scale is 6 ¾" long and is in very good, lightly used condition.